| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.ignite.platform; |
| |
| import java.io.Externalizable; |
| import java.io.IOException; |
| import java.io.ObjectInput; |
| import java.io.ObjectOutput; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import javax.cache.Cache; |
| import org.apache.ignite.Ignite; |
| import org.apache.ignite.IgniteCache; |
| import org.apache.ignite.IgniteException; |
| import org.apache.ignite.cache.query.SqlQuery; |
| import org.apache.ignite.cluster.ClusterNode; |
| import org.apache.ignite.compute.ComputeJob; |
| import org.apache.ignite.compute.ComputeJobAdapter; |
| import org.apache.ignite.compute.ComputeJobResult; |
| import org.apache.ignite.compute.ComputeTaskAdapter; |
| import org.apache.ignite.internal.util.typedef.F; |
| import org.apache.ignite.resources.IgniteInstanceResource; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Task that performs an SQL query and returns results. |
| */ |
| public class PlatformSqlQueryTask extends ComputeTaskAdapter<String, Object> { |
| /** {@inheritDoc} */ |
| @NotNull @Override public Map<? extends ComputeJob, ClusterNode> map(List<ClusterNode> subgrid, |
| @Nullable String arg) throws IgniteException { |
| return Collections.singletonMap(new SqlQueryJob(arg), F.first(subgrid)); |
| } |
| |
| /** {@inheritDoc} */ |
| @Nullable @Override public Object reduce(List<ComputeJobResult> results) throws IgniteException { |
| ComputeJobResult res = results.get(0); |
| |
| if (res.getException() != null) |
| throw res.getException(); |
| else |
| return results.get(0).getData(); |
| } |
| |
| /** |
| * Job. |
| */ |
| private static class SqlQueryJob extends ComputeJobAdapter implements Externalizable { |
| /** */ |
| @IgniteInstanceResource |
| private Ignite ignite; |
| |
| /** Argument. */ |
| private String arg; |
| |
| /** |
| * Constructor. |
| */ |
| public SqlQueryJob() { |
| // No-op. |
| } |
| |
| /** |
| * Constructor. |
| * |
| * @param arg Argument. |
| */ |
| private SqlQueryJob(String arg) { |
| this.arg = arg; |
| } |
| |
| /** {@inheritDoc} */ |
| @Nullable @Override public Object execute() { |
| IgniteCache<Integer, PlatformComputeBinarizable> cache = ignite.cache("default"); |
| |
| SqlQuery<Integer, PlatformComputeBinarizable> qry = new SqlQuery<>("PlatformComputeBinarizable", arg); |
| |
| List<Cache.Entry<Integer, PlatformComputeBinarizable>> qryRes = cache.query(qry).getAll(); |
| |
| Collection<PlatformComputeBinarizable> res = new ArrayList<>(qryRes.size()); |
| |
| for (Cache.Entry<Integer, PlatformComputeBinarizable> e : qryRes) |
| res.add(e.getValue()); |
| |
| return res; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void writeExternal(ObjectOutput out) throws IOException { |
| out.writeObject(arg); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { |
| arg = (String)in.readObject(); |
| } |
| } |
| } |